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fix hash in make_offered_htlc

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ThomasV 2018-04-17 06:59:21 +02:00 • committed by SomberNight
parent 635d924dff
commit b726d77bdc
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GPG key ID: B33B5F232C6271E9
2 changed files with 13 additions and 21 deletions
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8
electrum/crypto.py
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@ -134,16 +134,18 @@ def sha256d(x: Union[bytes, str]) -> bytes:
def hash_160(x: bytes) -> bytes:
return ripemd(sha256(public_key))
def ripemd(x):
try:
md = hashlib.new('ripemd160')
md.update(sha256(x))
md.update(x)
return md.digest()
except BaseException:
from . import ripemd
md = ripemd.new(sha256(x))
md = ripemd.new(x)
return md.digest()
def hmac_oneshot(key: bytes, msg: bytes, digest) -> bytes:
if hasattr(hmac, 'digest'):
# requires python 3.7+; faster

26
lib/lnbase.py
View file

@ -266,24 +266,14 @@ def make_offered_htlc(revocation_pubkey, remote_htlcpubkey, local_htlcpubkey, pa
assert type(remote_htlcpubkey) is bytes
assert type(local_htlcpubkey) is bytes
assert type(payment_preimage) is bytes
h = hashlib.new("ripemd160")
h.update(payment_preimage)
payment_hash = h.digest()#ripemd.new(payment_preimage).digest()
assert type(payment_hash) is bytes
return bytes([opcodes.OP_DUP, opcodes.OP_HASH160]) + bfh(push_script(bh2u(bitcoin.hash_160(revocation_pubkey)))) + bytes([opcodes.OP_EQUAL
, opcodes.OP_IF
, opcodes.OP_CHECKSIG
, opcodes.OP_ELSE]) +\
bfh(push_script(bh2u(remote_htlcpubkey))) + bytes([opcodes.OP_SWAP, opcodes.OP_SIZE]) + bitcoin.add_number_to_script(32) + bytes([opcodes.OP_EQUAL,
opcodes.OP_NOTIF,
# to local node via htlc-timeout transaction (timelocked)
opcodes.OP_DROP]) + bitcoin.add_number_to_script(2) + bytes([opcodes.OP_SWAP]) + bfh(push_script(bh2u(local_htlcpubkey))) + bitcoin.add_number_to_script(2) + bytes([opcodes.OP_CHECKMULTISIG,
opcodes.OP_ELSE,
# to remote node with preimage
opcodes.OP_HASH160]) + bfh(push_script(bh2u(payment_hash))) + bytes([opcodes.OP_EQUALVERIFY,
opcodes.OP_CHECKSIG,
opcodes.OP_ENDIF,
opcodes.OP_ENDIF])
payment_hash = bitcoin.sha256(payment_preimage)
return bytes([opcodes.OP_DUP, opcodes.OP_HASH160]) + bfh(push_script(bh2u(bitcoin.hash_160(revocation_pubkey))))\
+ bytes([opcodes.OP_EQUAL, opcodes.OP_IF, opcodes.OP_CHECKSIG, opcodes.OP_ELSE]) \
+ bfh(push_script(bh2u(remote_htlcpubkey)))\
+ bytes([opcodes.OP_SWAP, opcodes.OP_SIZE]) + bitcoin.add_number_to_script(32) + bytes([opcodes.OP_EQUAL, opcodes.OP_NOTIF, opcodes.OP_DROP])\
+ bitcoin.add_number_to_script(2) + bytes([opcodes.OP_SWAP]) + bfh(push_script(bh2u(local_htlcpubkey))) + bitcoin.add_number_to_script(2)\
+ bytes([opcodes.OP_CHECKMULTISIG, opcodes.OP_ELSE, opcodes.OP_HASH160])\
+ bfh(push_script(bh2u(bitcoin.ripemd(payment_hash)))) + bytes([opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG, opcodes.OP_ENDIF, opcodes.OP_ENDIF])
def make_commitment(ctn, local_funding_pubkey, remote_funding_pubkey, remotepubkey,
payment_pubkey, remote_payment_pubkey, revocation_pubkey, delayed_pubkey,